EP0461524B2 - Schussfadenzubringvorrichtung für Greiferwebmaschinen - Google Patents

Schussfadenzubringvorrichtung für Greiferwebmaschinen Download PDF

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Publication number
EP0461524B2
EP0461524B2 EP91109116A EP91109116A EP0461524B2 EP 0461524 B2 EP0461524 B2 EP 0461524B2 EP 91109116 A EP91109116 A EP 91109116A EP 91109116 A EP91109116 A EP 91109116A EP 0461524 B2 EP0461524 B2 EP 0461524B2
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EP
European Patent Office
Prior art keywords
presenting
weft
rods
yarn
gripper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91109116A
Other languages
English (en)
French (fr)
Other versions
EP0461524B1 (de
EP0461524A1 (de
Inventor
Luigi Pezzoli
Rossano Maffeo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NUOVA VAMATEX SpA
Original Assignee
NUOVA VAMATEX SpA
Vamatex Nuova SpA
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Publication date
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Application filed by NUOVA VAMATEX SpA, Vamatex Nuova SpA filed Critical NUOVA VAMATEX SpA
Publication of EP0461524A1 publication Critical patent/EP0461524A1/de
Publication of EP0461524B1 publication Critical patent/EP0461524B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the present invention concerns a weft yarn presenting device for gripper looms.
  • one or more weft yarns are inserted by a pair of grippers with alternate motion, cooperating at the centre of the shed, into the sequence of the warp yarns forming said shed.
  • presenting devices i.e. devices performing the function of selecting the weft yarns to be inserted and presenting them to the weft carrying or insertion grippers.
  • Such devices substantially comprise one or more rods having an eyelet into which passes a respective wet yarn to be presented. When one of said eyelets moves, it shifts the respective weft yarn from a rest position far from the gripper trajectory, to another position (called presenting position) wherein the weft yarn can be gripped by the carrying gripper and conveyed towards and into the warp shed.
  • weft control ends when the gripper moves out of the warp shed and the selection step requires a certain time for the yarn to be hooked, which depends on the force of the electromagnet and/or on the masses of the mechanical hooking elements having to be shifted.
  • said time corresponds to wider rotation angles of the loom for the selection step, hence to the detriment of the angles utilizable for the presenting step, the reduction of which leads to an increase in the mechanical stresses, in the wears and in the vibrations of the presenting device.
  • one is forced to anticipate the start of the selection step before the outlet of the gripper from the warp shed - which outlet determines the final time within which weft control can take place - rather than reducing the times for the presenting step.
  • the mechanical presenting devices require furthermore a motion transmission obtained with a mechanical drive by means of belts, chains or gears, which cause problems of alignment on assembly, require maintenance and limit the choice of the most suitable positioning on the loom for a proper weaving operation.
  • each of the presenting rods can act so as to regulate the tension of the weft yarn moved by the same.
  • the device according to the invention comprises - in known manner - a plurality of presenting rods 1, ending with an eyelet 2 for the weft yarn f and each controlled by a flexible cable 3 sliding into a sheath 4.
  • Figure 1 shows, by way of exam; ple, a device with eight rods 1, of which only one can be seen in figure 2.
  • the most suitable position of the guides 5, and thus of the rods 1 - for an efficient presenting of the various weft yarns - is obtained by acting on adjustable supports 6.
  • each of the flexible cables 3 controlling the rods 1 is operated by a linear electric motor.
  • the linear electric motors 7 are positioned radially, each aligned on the common axis of the rod 1, of the flexible cable 3 and of the corresponding guide 5 and sheath 4. These motors act directly on the flexible cables 3, causing short rectilinear alternate movements thereof, of adjustable amplitude. Equal movements are thus imparted on the rods 1.
  • the linear electric motors 8 are positioned in block and they operate the flexible cables 3 each through a rotating lever 9, to which the cable 3 is anchored in 10 and which is caused to perform, by the respective motor 8, short angular back and forth movements of adjustable amplitude (to which correspond short rectilinear alternate movements, of adjustable amplitude, of the rods 1).
  • linear electric motors used are of the conventional type and are hence not described in detail; it should simply be remembered that they allow to perform very precise movements, even if of limited amplitude, and to carry out a very precise adjustment of the operating times, of the working speeds, of the length and amplitude of the movements.
  • the presenting device is completed by electronic control means - preferably comprising a microprocessor - which also require no particular description as they are of conventional type. These means, shown by 11 in figure 2, are connected to the electronic control system 12 of the loom - to which the presenting device of the invention is applied - and to the linear electric motors 7 or 8, so as to allow constantly detecting, by way of a position sensor 13, the position taken up by the corresponding presenting rods 1.
  • the control system can therefore detect the tension of the weft yarn being inserted by the gripper into the warp shed, by measuring the feed current required by the bobbin to balance the force resulting on the eyelet 2. It ensues that the rod 1 in a presenting position can also act - see figure 4-as tension regulator during insertion, in that, according to the position of the eyelet 2 at the end of the presenting rod 1, in respect of fixed yarnguides 14, 15, weft yarn tension (T) varies to a certain extent during insertion. In fact, the more the eyelet 2 moves down in respect of the yarnguides 14, 15, the wider the winding angles of the weft yarn around said yarnguides.
  • the device according to the invention requires no mechanical motion transmissions and can thus be associated to the loom in the most functional area, for instance in a position high above the presenting area, so as not to hamper the intervention of the weaver and the insertion of the wefts.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Surgical Instruments (AREA)
  • Endoscopes (AREA)

Claims (5)

  1. Schußfadenzubringvorrichtung für Greiferwebmaschinen von der Art mit einer Mehrzahl von mit einer Garnführungsöse (2) versehenen Zubringstangen (1), die in Richtung auf die Zone (P), in der der Schußfaden von dem Schußfadengreifer ergriffen werden soll, konvergieren, und die jeweils durch einen flexiblen Draht (3), der in eine Aufnahme (4) gleitet, gesteuert werden, dadurch gekennzeichnet, daß jeder der die Stangen steuernden flexiblen Drähte durch einen elektrischen Linearmotor (7) betrieben wird, und dadurch, daß jedem auf einer mit der Stange (1) und dem flexiblen Draht (3) gemeinsamen Achse ausgerichteten und direkt aut den flexiblen Draht (3) und damit auf die Stange entlang der gemeinsamen Achse wirkenden elektrischen Linearmotor (7) elektronische Steuermittel (11) zugehörig sind, um die Position der Zubringstange, die von dem Motor betrieben wird, ständig zu beobachten und um den Motor entsprechend der Position, der Betriebsweise der Webmaschine und den physikalisch/textilen Merkmalen des verwebten Garns zu steuern.
  2. Vorrichtung nach Anspruch 1, wobei das Arbeiten jedes der die Zubringstangen (1) betreibenden Motors und damit das Zubringen und die Rückbewegungen jedes Eintrags bezüglich der Bewegungen, der Geschwindigkeit, der Beschleunigung, der Stoppzeitpunkte in der Zubringposition und in der Ruheposition entsprechend den physikalisch/textilen Eigenschaften des Fadens programmiert werden kann, und mit der Möglichkeit, die Eintragposition in der Ruhe bezüglich des Greifers zu berücksichtigen.
  3. Vorrichtung nach Anspruch 2, wobei die Hübe, Geschwindigkeiten, Beschleunigungen und Start- und/oder Endzeitpunkte der Zubringregel und/oder der Rückkehrregel entsprechend der statistischen Neigung der Eintragstopps, die von dem Webmaschinensteuersystem (12) erkannt werden, modifiziert werden.
  4. Vorrichtung nach Anspruch 2, geeignet, um dem Operator etwaige Probleme mittels eines geeigneten Diagnoseprogramms zu signalisieren.
  5. Vorrichtung nach Anspruch 1, wobei jede der Zubringstangen (1) wirken kann, um die Spannung des Schußfadens, die von diesem bewegt wird, zu regulieren.
EP91109116A 1990-06-11 1991-06-04 Schussfadenzubringvorrichtung für Greiferwebmaschinen Expired - Lifetime EP0461524B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2059890 1990-06-11
IT02059890A IT1248715B (it) 1990-06-11 1990-06-11 Dispositivo di presentazione della trama per telai di tessitura a pinze

Publications (3)

Publication Number Publication Date
EP0461524A1 EP0461524A1 (de) 1991-12-18
EP0461524B1 EP0461524B1 (de) 1995-02-22
EP0461524B2 true EP0461524B2 (de) 1999-03-10

Family

ID=11169360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109116A Expired - Lifetime EP0461524B2 (de) 1990-06-11 1991-06-04 Schussfadenzubringvorrichtung für Greiferwebmaschinen

Country Status (8)

Country Link
EP (1) EP0461524B2 (de)
AT (1) ATE118831T1 (de)
DE (1) DE69107517T3 (de)
DK (1) DK0461524T3 (de)
ES (1) ES2069120T5 (de)
GR (1) GR3015932T3 (de)
HK (1) HK46396A (de)
IT (1) IT1248715B (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1006347A3 (nl) 1992-11-16 1994-07-26 Picanol Nv Inrichting voor het presenteren van inslagdraden bij weefmachines.
DE4325905C1 (de) * 1993-08-02 1994-10-06 Dornier Gmbh Lindauer Vorrichtung zum Zuführen von Schußfäden zu einem Schußfadeneintragorgan in Webmaschinen
IT1273103B (it) * 1994-04-05 1997-07-04 Panter Srl Dispositivo di presentazione dei fili di trama per una macchina di tessitura
DE29713979U1 (de) * 1997-07-04 1997-10-16 Textilma Ag, Hergiswil Kettenwirkmaschine, insbesondere Häkelgalonmaschine
IT1293507B1 (it) * 1997-07-30 1999-03-01 Nuovo Pignone Spa Dispositivo selettore per la presentazione dei fili di trama nei telai tessili senza navetta
IT1293506B1 (it) * 1997-07-30 1999-03-01 Nuovo Pignone Spa Dispositivo modulare per la presentazione dei fili di trama nei telai tessili senza navetta
EP1024214B1 (de) * 1999-01-28 2006-05-17 Sultex AG Vorrichtung und Anordnung zum Vorlegen eines Schussfadens für eine Greiferwebmaschine
JP2000220060A (ja) 1999-01-28 2000-08-08 Sulzer Textil Ag レピア織機の緯糸供給装置及び配列構造
DE50015789D1 (de) 1999-09-23 2009-12-24 Itema Switzerland Ltd Webmaschine mit einem Eintragungssystem für eine Mehrzahl von in der Regel unterschiedlicher Schussfäden
EP1099784B1 (de) 1999-09-23 2009-11-11 ITEMA (Switzerland) Ltd. Webmaschine mit einem Eintragungssystem für eine Mehrzahl von in der Regel unterschiedlicher Schussfäden
EP1353000A1 (de) * 2002-04-10 2003-10-15 Lin, Chen-Hui Schussfadenwähler für eine Bandwebmaschine
DE60303286T2 (de) * 2003-07-10 2006-07-27 Promatech S.P.A., Colzate Schussfadenzubringvorrichtung für Webmaschinen mit einer einzigen Zubringstange
EP1777327B1 (de) 2005-10-20 2009-01-21 Luigi Omodeo Zorini Nadelwebmaschine mit automatischem Schussfadenwechsel
ITUB20160421A1 (it) * 2016-02-01 2016-05-01 Rinaldo Sperotto PRESENTATRICE ROTATIVA per macchine da tessere a preselezione meccanica e comando elettronico
CN113417052A (zh) * 2021-07-19 2021-09-21 杭州纳众科技有限公司 一种选纬器连接结构和选纬器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH418248A (de) * 1964-10-26 1966-07-31 Scheffel Walter Farbenwechselapparat für schützenlose Webmaschinen
CH450315A (de) * 1967-05-09 1968-01-15 Rueti Ag Maschf Anordnung zum wahlweisen Zubringen von Schussfäden verschiedener Art an eine Fadenübernahmestelle
US3780775A (en) * 1972-08-25 1973-12-25 Rockwell International Corp Weft control mechanism for shuttleless looms
JPS57205553A (en) * 1981-06-10 1982-12-16 Tsudakoma Ind Co Ltd Weft yarn selector of loom
DE3315320A1 (de) * 1983-04-27 1984-10-31 Emil Jäger GmbH & Co KG, 4400 Münster Vorrichtung zum eintragen von schussfaeden bei webmaschinen

Also Published As

Publication number Publication date
DE69107517T2 (de) 1995-08-10
EP0461524B1 (de) 1995-02-22
ES2069120T3 (es) 1995-05-01
ATE118831T1 (de) 1995-03-15
HK46396A (en) 1996-03-22
DK0461524T3 (da) 1995-07-24
DE69107517T3 (de) 2000-08-10
GR3015932T3 (en) 1995-07-31
DE69107517D1 (de) 1995-03-30
IT9020598A1 (it) 1991-12-11
IT9020598A0 (de) 1990-06-11
EP0461524A1 (de) 1991-12-18
IT1248715B (it) 1995-01-26
ES2069120T5 (es) 1999-08-01

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